[Acrab (Victor Martinez)]

Hi,
Does anyone know if the side fans that are installed in the big Newton telescope to sweep the boundary layer, are more effective in extracting or introducing air? Actually, in my 16" dobsonian telescope I have three 120 mm fans, one in the back venting the primary, and other two side drawing air from boundary layer.
Anyway, this of thermal acclimation of mirrors of a given thickness, it is difficult to solve
Víctor